A method and apparatus is provided for countering asymmetrical aerodynamic
forces subjected onto an aircraft. Asymmetrical forces are counteracted by
this invention automatically by selectively actuating force inducing
elements in response detection of one of (a) differential longitudinal
forces induced upon the aircraft by the engines and (b) undesirable
rotation of the aircraft about longitudinal axis "c" of the aircraft. The
force inducing elements of this invention function independent of primary
control elements and other control surfaces of the aircraft.